Norway rat

noun

1. an Old World rat, Rattus norvegicus, having a grayish-brown body with whitish underparts and a long, scaly tail, now common in the U.S. in or near homes, barns, wharves, etc.

Norway rat

noun

1. See brown rat
   another name for brown rat

Word History and Origins

Origin of Norway rat¹

First recorded in 1745–55